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Sacrificial Anodes

Marine Sacrificial Anodes & Corrosion Protection

Shop Marine Sacrificial Anodes

Find zinc anodes, aluminum anodes, magnesium anodes, anode kits, shaft anodes, trim tab anodes, engine anodes, outdrive anodes, propeller anodes, and installation hardware for corrosion protection in saltwater, brackish water, and freshwater applications.

Shop Sacrificial Anodes Zinc Anodes Anode Kits
Material Guide

Match anode material to your water type, then confirm dimensions, mounting style, and exact application.

Read Corrosion Protection Guide

Always confirm anode material, dimensions, fastener style, and application for your vessel, drive, engine, shaft, or underwater hardware.

Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM Shaft Anodes Trim Tab Anodes Outdrive Anodes Propeller Anodes Engine Anodes

Top OEM Anode Searches

Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM

Highlighted Anode Categories

Zinc AnodesCommon saltwater protection Aluminum AnodesSaltwater and brackish use Magnesium AnodesFreshwater applications Anode KitsMatched service sets Shaft AnodesProp shaft protection Trim Tab AnodesTabs and planes Engine AnodesCooling-system protection Outdrive AnodesSterndrive protection Propeller AnodesProp and hub protection

Browse Fast

Shop by Anode Category

Choose the anode material, kit, or application that matches your water type and the metal component you need to protect.

All Sacrificial Anodes Zinc Anodes Aluminum Anodes Magnesium Anodes Anode Kits Shaft Anodes Installation Hardware

Why It Matters

Anodes Help Protect Underwater Metals from Corrosion

Sacrificial anodes are designed to corrode before more valuable underwater metals such as shafts, propellers, trim tabs, outdrives, thru-hulls, and engine cooling components.

Using the correct anode material and replacing anodes before they are fully consumed helps reduce galvanic corrosion and supports longer component life.

H2O

Match Water Type

Zinc is commonly used for saltwater, aluminum can work in saltwater and brackish water, and magnesium is typically used for freshwater applications.

FIT

Confirm Shape and Size

Check diameter, length, hole spacing, thread, mounting hardware, contact surface, and whether the anode fits a shaft, tab, drive, engine, or propeller.

KIT

Use Kits When Possible

Anode kits help replace multiple matched pieces on a drive or engine at the same time, reducing missed parts during seasonal service.

Parts Desk Guidance

Single Anode or Complete Kit?

If one anode is damaged, missing, or consumed faster than the rest, a single replacement may be enough. For seasonal service or unknown history, a complete anode kit can be the better choice because it refreshes all key protection points together.

Choose zinc anodes For many saltwater applications where zinc is specified by the manufacturer or existing setup.
Choose aluminum anodes For many saltwater and brackish applications, especially where aluminum anodes are specified for drives or kits.
Choose magnesium anodes For freshwater applications where magnesium is required and saltwater exposure is not expected.
Choose anode kits For matched replacement sets on outdrives, engines, trim systems, thrusters, or other grouped applications.

Common Questions

Sacrificial Anode Buying Help

How do I choose the correct anode material?

Start with the water type and manufacturer recommendation. Zinc is often used in saltwater, aluminum is common for saltwater or brackish use, and magnesium is typically for freshwater.

When should sacrificial anodes be replaced?

Replace anodes when they are heavily wasted, loose, damaged, missing, or near half consumed. Inspect them regularly and during seasonal service.

Can I mix zinc, aluminum, and magnesium anodes?

Avoid mixing anode materials on the same bonded system unless the manufacturer specifically allows it. Mixed materials can reduce protection or cause uneven performance.

Why do anode dimensions matter?

Anodes need solid metal-to-metal contact and the correct mounting shape. Wrong dimensions, paint, loose fasteners, or poor contact can prevent proper protection.

Ready to Find Your Part?

Search Zinc, Aluminum, Magnesium Anodes & Kits

Use the collection page or search by water type, brand, application, kit, drive model, shaft size, or existing part number.

Shop All Anodes Corrosion Guide Volvo Penta Mercury / MerCruiser Yanmar Crusader Indmar PCM

Filters

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Aluminum Side Power Bow Thruster Anode CMT-SGSL565A

$1.18 - $1.18
$1.18
$1.18
$1.18 - $1.18
$1.18
in stock

The Martyr CMT-SGSL565A is an aluminum replacement bow thruster anode for select Sleipner / Side-Power thruster applications. It is designed to pro...

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$1.18 - $1.18
$1.18
$1.18
$1.18 - $1.18
$1.18

Volvo Penta Zinc Anode 823661

$33.50 - $33.50
$33.50
$33.50
$33.50 - $33.50
$33.50
Only 3 left!

Volvo Penta 823661 is a genuine zinc anode used to help protect selected Volvo Penta engine cooling-system components from galvanic corrosion. Curr...

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$33.50 - $33.50
$33.50
$33.50
$33.50 - $33.50
$33.50

MerCruiser Bravo 2 & 3 Aluminum Anode Kit (B23KA)

$58.81 - $58.81
$58.81
$58.81 - $58.81
$58.81
Only 1 left!

Freshwater-Optimized Corrosion Protection for Bravo 2 & 3 SterndrivesProtect your MerCruiser Bravo 2 or Bravo 3 sterndrive from galvanic corros...

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$58.81 - $58.81
$58.81
$58.81 - $58.81
$58.81

MerCruiser Bravo 2 & 3 Zinc Anode Kit (B23KZ)

$92.41 - $92.41
$92.41
$92.41 - $92.41
$92.41
Only 1 left!

Full Zinc Protection for MerCruiser Bravo 2 & 3 SterndrivesKeep your MerCruiser Bravo 2 or Bravo 3 sterndrive protected from galvanic corrosion...

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$92.41 - $92.41
$92.41
$92.41 - $92.41
$92.41

Canada Metal Aluminum Anode Kit — Yamaha 150HP

$54.22 - $54.22
$54.22
$54.22
$54.22 - $54.22
$54.22
Only 2 left!

Canada Metal Aluminum Anode Kit — Yamaha 150HP OutboardProtect your Yamaha 150HP outboard from galvanic corrosion with this complete aluminum anode...

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$54.22 - $54.22
$54.22
$54.22
$54.22 - $54.22
$54.22

Aluminum Anode Kit for MerCruiser Bravo Two & Three Sterndrives | BRAVO23KITA

$0.00 - $0.00
$0.00
$78.72
$78.72 - $78.72
$78.72
Only 2 left!

Aluminum Anode Kit — MerCruiser Bravo Two & Three SterndrivesThis aluminum sacrificial anode kit provides complete galvanic corrosion protectio...

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$0.00 - $0.00
$0.00
$78.72
$78.72 - $78.72
$78.72
Bow Thruster Zinc Vetus BP 129

Bow Thruster Zinc Vetus BP 129

$37.54 - $37.54
$37.54
$37.54 - $37.54
$37.54

Vetus Bow Thruster Anode - Zinc

$37.54 - $37.54
$37.54
$37.54 - $37.54
$37.54

Lewmar - Anode Kit for 185TT - 589350

$0.00 - $0.00
$0.00
$40.78
$40.78 - $40.78
$40.78

Lewmar Anode Kit for 185TT Thruster — 589350The Lewmar 589350 Anode Kit is the OEM replacement sacrificial anode set for the Lewmar 185TT bow or st...

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$0.00 - $0.00
$0.00
$40.78
$40.78 - $40.78
$40.78

Lewmar - Anode Kit for 250TT - 589550

$0.00 - $0.00
$0.00
$102.32
$102.32 - $102.32
$102.32

Lewmar Anode Kit for 250TT Thruster — 589550The Lewmar 589550 Anode Kit is the OEM replacement sacrificial anode set for the Lewmar 250TT bow or st...

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$0.00 - $0.00
$0.00
$102.32
$102.32 - $102.32
$102.32
Anode-Kohler

Anode-Kohler

$19.09 - $19.09
$19.09
$19.09 - $19.09
$19.09
In stock

Generator Pencil Anode

$19.09 - $19.09
$19.09
$19.09 - $19.09
$19.09
Maryr Zinc Plate w/Steel Straps

Maryr Zinc Plate w/Steel Straps

$53.49 - $53.49
$53.49
$53.49 - $53.49
$53.49
In stock

Zinc Plates w/Straps. Note: Hole dimension is the distance between holes.Zinc for use in salt water. Aluminum for use in brackish water.

$53.49 - $53.49
$53.49
$53.49 - $53.49
$53.49
Martyr CMZ24BS Zinc Hull Anode (For Sea Ray) 1.25" x 6.25" x 14"

Martyr CMZ24BS Zinc Hull Anode (For Sea Ray) 1.25" x 6.25" x 14"

$304.49 - $304.49
$304.49
$304.49 - $304.49
$304.49
In stock

Hull Anode - Zinc.Hole dimension is the distance between holes.

$304.49 - $304.49
$304.49
$304.49 - $304.49
$304.49

Quicksilver Power Trim Anode 818298Q1 | Mercury & OptiMax Outboards (Aluminum)

$43.56 - $43.56
$43.56
$43.56 - $43.56
$43.56
In stock

Quicksilver Power Trim Anode 818298Q1 — Aluminum | Mercury & OptiMax OutboardsProtect your Mercury or OptiMax outboard’s power trim system from...

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$43.56 - $43.56
$43.56
$43.56 - $43.56
$43.56

Quicksilver Anodic Plate 76214Q5 | Mercury, Mariner & MerCruiser Drives (Aluminum)

$46.23 - $46.23
$46.23
$46.23 - $46.23
$46.23
In stock

Quicksilver Anodic Plate 76214Q5 — Aluminum | Mercury, Mariner & MerCruiser DrivesShield your Mercury, Mariner, or MerCruiser drive from galvan...

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$46.23 - $46.23
$46.23
$46.23 - $46.23
$46.23
Maryr Zinc Plate w/Steel Straps

Maryr Zinc Plate w/Steel Straps

$87.69 - $87.69
$87.69
$87.69 - $87.69
$87.69
In stock

Zinc Plates w/Straps. Note: Hole dimension is the distance between holes.Zinc for use in salt water. Aluminum for use in brackish water.

$87.69 - $87.69
$87.69
$87.69 - $87.69
$87.69
Martyr CMZHC5 Zinc Hull Anode 4" x 8"

Martyr CMZHC5 Zinc Hull Anode 4" x 8"

$108.87 - $108.87
$108.87
$108.87 - $108.87
$108.87
In stock

Hull Anode - Zinc.Hole dimension is the distance between holes.

$108.87 - $108.87
$108.87
$108.87 - $108.87
$108.87
Maryr Zinc Plate w/Steel Straps

Maryr Zinc Plate w/Steel Straps

$201.89 - $201.89
$201.89
$201.89 - $201.89
$201.89
In stock

Zinc Plates w/Straps. Note: Hole dimension is the distance between holes.Zinc for use in salt water. Aluminum for use in brackish water.

$201.89 - $201.89
$201.89
$201.89 - $201.89
$201.89
Martyr CMZHC2 Zinc Hull Anode 2.65" x 5.75"

Martyr CMZHC2 Zinc Hull Anode 2.65" x 5.75"

$60.47 - $60.47
$60.47
$60.47 - $60.47
$60.47
In stock

Hull Anode - Zinc.Hole dimension is the distance between holes.

$60.47 - $60.47
$60.47
$60.47 - $60.47
$60.47
Maryr Zinc Plate w/Aluminum Straps

Maryr Zinc Plate w/Aluminum Straps

$48.39 - $48.39
$48.39
$48.39 - $48.39
$48.39
In stock

Zinc Plates w/Straps. Note: Hole dimension is the distance between holes.Zinc for use in salt water. Aluminum for use in brackish water.

$48.39 - $48.39
$48.39
$48.39 - $48.39
$48.39
Martyr CMZHC3 Zinc Hull Andoe 2.75" x 6.25"

Martyr CMZHC3 Zinc Hull Andoe 2.75" x 6.25"

$68.13 - $68.13
$68.13
$68.13 - $68.13
$68.13
In stock

Hull Anode - Zinc.Hole dimension is the distance between holes.

$68.13 - $68.13
$68.13
$68.13 - $68.13
$68.13
Martyr Anode Kit For Yamaha 80-100 HP Outboards, Zinc

Martyr Anode Kit For Yamaha 80-100 HP Outboards, Zinc

$42.20 - $42.20
$42.20
$42.20 - $42.20
$42.20
In stock

Comes complete with 3 anodes, hardware and install instructions .CMY80100KIT Yamaha 80-100HP Anode Kit- Includes: CM6H14525102 (1), CM67F4537100 (1...

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$42.20 - $42.20
$42.20
$42.20 - $42.20
$42.20
Martyr Anode Kit For Yamaha 60-90 HP Outboards, Aluminum

Martyr Anode Kit For Yamaha 60-90 HP Outboards, Aluminum

$36.84 - $36.84
$36.84
$36.84 - $36.84
$36.84
In stock

Comes complete with 3 anodes, hardware and install instructions .CMY6090KIT Yamaha 60-90HP Anode Kit- Includes: CM6884537102 (1), CM6H14525102 (1)

$36.84 - $36.84
$36.84
$36.84 - $36.84
$36.84
Sl Shaft Anode CMX01M (3/4), Magnesium

Sl Shaft Anode CMX01M (3/4), Magnesium

$27.59 - $27.59
$27.59
$27.59 - $27.59
$27.59
In stock

Streamlined Shaft Anodes w/Allen Screw

$27.59 - $27.59
$27.59
$27.59 - $27.59
$27.59
Martyr Anode Kit For Yamaha 80-100 HP Outboards, Aluminum

Martyr Anode Kit For Yamaha 80-100 HP Outboards, Aluminum

$37.79 - $37.79
$37.79
$37.79 - $37.79
$37.79
In stock

Comes complete with 3 anodes, hardware and install instructions .CMY80100KIT Yamaha 80-100HP Anode Kit- Includes: CM6H14525102 (1), CM67F4537100 (1...

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$37.79 - $37.79
$37.79
$37.79 - $37.79
$37.79
Martyr Anode Kit For Yamaha 60-90 HP Outboards, Zinc

Martyr Anode Kit For Yamaha 60-90 HP Outboards, Zinc

$38.63 - $38.63
$38.63
$38.63 - $38.63
$38.63
In stock

Comes complete with 3 anodes, hardware and install instructions .CMY6090KIT Yamaha 60-90HP Anode Kit- Includes: CM6884537102 (1), CM6H14525102 (1)

$38.63 - $38.63
$38.63
$38.63 - $38.63
$38.63
Mercury Verado 6-Cylinder Anode Kit - Magnesium

Mercury Verado 6-Cylinder Anode Kit - Magnesium

$158.59 - $158.59
$158.59
$158.59 - $158.59
$158.59
In stock

Mercury Verado anode kits. Comes complete with anodes, hardware and install instructions. Includes: CM880653 Plate, CM892227 Power Trim, CM826134 W...

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$158.59 - $158.59
$158.59
$158.59 - $158.59
$158.59
Sl Shaft Anode CMX01AL (3/4), Aluminum

Sl Shaft Anode CMX01AL (3/4), Aluminum

$11.54 - $11.54
$11.54
$11.54 - $11.54
$11.54
In stock

Streamlined Shaft Anodes w/Allen Screw

$11.54 - $11.54
$11.54
$11.54 - $11.54
$11.54
1/2" Shaft Anode, Zinc

1/2" Shaft Anode, Zinc

$18.15 - $18.15
$18.15
$18.15 - $18.15
$18.15
In stock

Streamlined Shaft Anodes w/Allen Screw

$18.15 - $18.15
$18.15
$18.15 - $18.15
$18.15
Mercury Verado 4-Cylinder Anode Kit - Aluminum

Mercury Verado 4-Cylinder Anode Kit - Aluminum

$83.78 - $83.78
$83.78
$83.78 - $83.78
$83.78
In stock

Mercury Verado anode kits. Comes complete with anodes, hardware and install instructions. Includes: CM818298 Transom Bar, CM826134 Wedge, (2) CM762...

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$83.78 - $83.78
$83.78
$83.78 - $83.78
$83.78
Mercury Verado 6-Cylinder Anode Kit - Aluminum

Mercury Verado 6-Cylinder Anode Kit - Aluminum

$83.99 - $83.99
$83.99
$83.99 - $83.99
$83.99
In stock

Mercury Verado anode kits. Comes complete with anodes, hardware and install instructions. Includes: CM880653 Plate, CM892227 Power Trim, CM826134 W...

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$83.99 - $83.99
$83.99
$83.99 - $83.99
$83.99
3/4" Shaft Anode, Zinc

3/4" Shaft Anode, Zinc

$17.10 - $17.10
$17.10
$17.10 - $17.10
$17.10
In stock

Streamlined Shaft Anodes w/Allen Screw

$17.10 - $17.10
$17.10
$17.10 - $17.10
$17.10
Martyr V18 Anode For Volvo Penta

Martyr V18 Anode For Volvo Penta

$23.29 - $23.29
$23.29
$23.29 - $23.29
$23.29
In stock

Volvo zinc large ring anode, magnesium.Replaces OEM #875815-3.

$23.29 - $23.29
$23.29
$23.29 - $23.29
$23.29
Martyr Streamlined Shaft Anode With Stainless Steel Allen Head, Zinc

Martyr Streamlined Shaft Anode With Stainless Steel Allen Head, Zinc

$81.68 - $81.68
$81.68
$81.68 - $81.68
$81.68
In stock

Streamlined Shaft Anodes w/Allen Screw

$81.68 - $81.68
$81.68
$81.68 - $81.68
$81.68
Martyr Anode Kit For Yamaha 40-60 HP Outboards, Aluminum

Martyr Anode Kit For Yamaha 40-60 HP Outboards, Aluminum

$28.02 - $28.02
$28.02
$28.02 - $28.02
$28.02
In stock

Comes complete with 3 anodes, hardware and install instructions .CMY4060KIT Yamaha 4T 40-60HP Anode Kit- Includes: CM6E04525111 (3), CM67C4525100 (...

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$28.02 - $28.02
$28.02
$28.02 - $28.02
$28.02
Martyr Replacement Prop Nut Anode, Aluminum, Series D

Martyr Replacement Prop Nut Anode, Aluminum, Series D

$21.72 - $21.72
$21.72
$21.72 - $21.72
$21.72
In stock

Replacement Prop Nut Anode

$21.72 - $21.72
$21.72
$21.72 - $21.72
$21.72
Martyr V18 Anode For Volvo Penta

Martyr V18 Anode For Volvo Penta

$29.28 - $29.28
$29.28
$29.28 - $29.28
$29.28
In stock

Volvo zinc large ring anode, zinc.Replaces OEM #875815-3.

$29.28 - $29.28
$29.28
$29.28 - $29.28
$29.28
Martyr Streamlined Shaft Anode With Stainless Steel Allen Head, Zinc

Martyr Streamlined Shaft Anode With Stainless Steel Allen Head, Zinc

$76.32 - $76.32
$76.32
$76.32 - $76.32
$76.32
In stock

Streamlined Shaft Anodes w/Allen Screw

$76.32 - $76.32
$76.32
$76.32 - $76.32
$76.32
Martyr CMX09M Streamlined Shaft Anode With Stainless Steel Allen Head, Magnesium

Martyr CMX09M Streamlined Shaft Anode With Stainless Steel Allen Head, Magnesium

$62.89 - $62.89
$62.89
$62.89 - $62.89
$62.89
In stock

Streamlined Shaft Anodes w/Allen Screw

$62.89 - $62.89
$62.89
$62.89 - $62.89
$62.89
Martyr CMX08M Streamlined Shaft Anode With Stainless Steel Allen Head, Magnesium

Martyr CMX08M Streamlined Shaft Anode With Stainless Steel Allen Head, Magnesium

$56.89 - $56.89
$56.89
$56.89 - $56.89
$56.89
In stock

Streamlined Shaft Anodes w/Allen Screw

$56.89 - $56.89
$56.89
$56.89 - $56.89
$56.89
Martyr CMY300350XPKITA Yamaha Anode Kit, Aluminum

Martyr CMY300350XPKITA Yamaha Anode Kit, Aluminum

$63.93 - $63.93
$63.93
$63.93 - $63.93
$63.93
In stock

Comes complete with installation instructions .Aluminum for salt and brackish waterMagnesium for fresh waterZinc for salt water

$63.93 - $63.93
$63.93
$63.93 - $63.93
$63.93
Martyr Replacement Prop Nut Anode, Zinc, Series D

Martyr Replacement Prop Nut Anode, Zinc, Series D

$27.29 - $27.29
$27.29
$27.29 - $27.29
$27.29
In stock

Replacement Prop Nut Anode

$27.29 - $27.29
$27.29
$27.29 - $27.29
$27.29
Martyr Replacement Prop Nut Anode, Zinc, Series H

Martyr Replacement Prop Nut Anode, Zinc, Series H

$87.03 - $87.03
$87.03
$87.03 - $87.03
$87.03
In stock

Replacement Prop Nut Anode

$87.03 - $87.03
$87.03
$87.03 - $87.03
$87.03
Martyr CMX08AL Streamlined Shaft Anode With Stainless Steel Allen Head, Aluminum

Martyr CMX08AL Streamlined Shaft Anode With Stainless Steel Allen Head, Aluminum

$31.59 - $31.59
$31.59
$31.59 - $31.59
$31.59
In stock

Streamlined Shaft Anodes w/Allen Screw

$31.59 - $31.59
$31.59
$31.59 - $31.59
$31.59
Martyr Replacement Prop Nut Anode, Zinc, Series C

Martyr Replacement Prop Nut Anode, Zinc, Series C

$21.30 - $21.30
$21.30
$21.30 - $21.30
$21.30
In stock

Replacement Prop Nut Anode

$21.30 - $21.30
$21.30
$21.30 - $21.30
$21.30
Martyr CMX09AL Streamlined Shaft Anode With Stainless Steel Allen Head, Aluminum

Martyr CMX09AL Streamlined Shaft Anode With Stainless Steel Allen Head, Aluminum

$29.39 - $29.39
$29.39
$29.39 - $29.39
$29.39
In stock

Streamlined Shaft Anodes w/Allen Screw

$29.39 - $29.39
$29.39
$29.39 - $29.39
$29.39
Martyr V18 Anode For Volvo Penta

Martyr V18 Anode For Volvo Penta

$28.55 - $28.55
$28.55
$28.55 - $28.55
$28.55
In stock

Volvo zinc large ring anode, aluminum.Replaces OEM #875815-3.

$28.55 - $28.55
$28.55
$28.55 - $28.55
$28.55
Martyr Streamlined Shaft Anode With Stainless Steel Allen Head, Zinc

Martyr Streamlined Shaft Anode With Stainless Steel Allen Head, Zinc

$38.63 - $38.63
$38.63
$38.63 - $38.63
$38.63
In stock

Streamlined Shaft Anodes w/Allen Screw

$38.63 - $38.63
$38.63
$38.63 - $38.63
$38.63
Martyr CMX07M Streamlined Shaft Anode With Stainless Steel Allen Head, Magnesium

Martyr CMX07M Streamlined Shaft Anode With Stainless Steel Allen Head, Magnesium

$36.89 - $36.89
$36.89
$36.89 - $36.89
$36.89
In stock

Streamlined Shaft Anodes w/Allen Screw

$36.89 - $36.89
$36.89
$36.89 - $36.89
$36.89